CVE-2022-49425
f2fs: fix dereference of stale list iterator after loop body
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dereference of stale list iterator after loop body The list iterator variable will be a bogus pointer if no break was hit. Dereferencing it (cur->page in this case) could load an out-of-bounds/undefined value making it unsafe to use that in the comparision to determine if the specific element was found. Since 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that by chance (or intention of an attacker) it matches the value of 'page' even though the correct element was not found. This is fixed by using a separate list iterator variable for the loop and only setting the original variable if a suitable element was found. Then determing if the element was found is simply checking if the variable is set.
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 80% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < 385edd3ce5b4b1e9d31f474a5e35a39779ec1110
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < 5e47a7add3dda7f236548c5ec3017776dc2a729f
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < 51d584704d18e60fa473823654f35611c777b291
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < 45b2b7d7108ae1e25a5036cab04ab9273e792332
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < b26e1c777890e4b938136deb8ec07a29f33862e4
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < ed7efc472c00986dcd6903ab6ed165c7fa167674
- affected 8c242db9b8c01b252290e23827163787f07e01d1 – < 2aaf51dd39afb6d01d13f1e6fe20b684733b37d5
- affected 4.12
- unaffected < 4.12
- unaffected 4.19.247 – ≤ 4.19.*
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.121 – ≤ 5.10.*
- unaffected 5.15.46 – ≤ 5.15.*
- unaffected 5.17.14 – ≤ 5.17.*
- unaffected 5.18.3 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (7)
- https://git.kernel.org/stable/c/385edd3ce5b4b1e9d31f474a5e35a39779ec1110 (opens in a new tab)
- https://git.kernel.org/stable/c/5e47a7add3dda7f236548c5ec3017776dc2a729f (opens in a new tab)
- https://git.kernel.org/stable/c/51d584704d18e60fa473823654f35611c777b291 (opens in a new tab)
- https://git.kernel.org/stable/c/45b2b7d7108ae1e25a5036cab04ab9273e792332 (opens in a new tab)
- https://git.kernel.org/stable/c/b26e1c777890e4b938136deb8ec07a29f33862e4 (opens in a new tab)
- https://git.kernel.org/stable/c/ed7efc472c00986dcd6903ab6ed165c7fa167674 (opens in a new tab)
- https://git.kernel.org/stable/c/2aaf51dd39afb6d01d13f1e6fe20b684733b37d5 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49425)Record last updated .